<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>

        body {color:red;}
        h1 {color:#00ff00;}
        h2 {color:rgb(255,0,0);}

    </style>
</head>
<body>
    关于颜色
    <h1>颜色</h1>
    <h2>颜色 </h2>
</body>
</html>